文章介绍了一种由工业计算机控制的变频调速闭环控制系统，同时介绍了该系统的控制功能和电气实现。
The closed circuit control system with frequency conversion for adjusting speed controlled by industrial computer is introduced with its control function and realization.
介绍了HC 40 0可逆冷轧机液压压下厚度计算机控制系统的总体组成，并较详细地介绍了厚度闭环用的STD工控机硬件和软件设计。
The composition of the hydraulic gauge computer control system for HC 400 reversing cold mill is introduced. The hardware and software designs of STD industrial control computer are described.
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